Which of the following statements best illustrates the relationship between human population growth and the extinction of species over the last 10,000 years? a) as human populations have increased, species extinction has decreased. b) as human populations have increased, species extinction has increased. c) as human populations have decreased, species extinction has decreased. d) as human populations have decreased, species extinction has increased.

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.